function Swipe(container, options) {

    "use strict";
  
    // utilities
    var noop = function() {}; // simple no operation function
    var offloadFn = function(fn) { setTimeout(fn || noop, 0) }; // offload a functions execution
  
    // check browser capabilities
    var browser = {
      addEventListener: !!window.addEventListener,
      touch: ('ontouchstart' in window) || window.DocumentTouch && document instanceof DocumentTouch,
      transitions: (function(temp) {
        var props = ['transitionProperty', 'WebkitTransition', 'MozTransition', 'OTransition', 'msTransition'];
        for ( var i in props ) if (temp.style[ props[i] ] !== undefined) return true;
        return false;
      })(document.createElement('swipe'))
    };
  
    // quit if no root element
    if (!container) return;
    var element = container.children[0];
    var slides, slidePos, width, length;
    options = options || {};
    var index = parseInt(options.startSlide, 10) || 0;
    var speed = options.speed || 300;
    options.continuous = options.continuous !== undefined ? options.continuous : true;
  
    function setup() {
  
      // cache slides
      slides = element.children;
      length = slides.length;
  
      // set continuous to false if only one slide
      if (slides.length < 2) options.continuous = false;
  
      //special case if two slides
      if (browser.transitions && options.continuous && slides.length < 3) {
        element.appendChild(slides[0].cloneNode(true));
        element.appendChild(element.children[1].cloneNode(true));
        slides = element.children;
      }
  
      // create an array to store current positions of each slide
      slidePos = new Array(slides.length);
  
      // determine width of each slide
      width = container.getBoundingClientRect().width || container.offsetWidth;
  
      element.style.width = (slides.length * width) + 'px';
  
      // stack elements
      var pos = slides.length;
      while(pos--) {
  
        var slide = slides[pos];
  
        slide.style.width = width + 'px';
        slide.setAttribute('data-index', pos);
  
        if (browser.transitions) {
          slide.style.left = (pos * -width) + 'px';
          move(pos, index > pos ? -width : (index < pos ? width : 0), 0);
        }
  
      }
  
      // reposition elements before and after index
      if (options.continuous && browser.transitions) {
        move(circle(index-1), -width, 0);
        move(circle(index+1), width, 0);
      }
  
      if (!browser.transitions) element.style.left = (index * -width) + 'px';
  
      container.style.visibility = 'visible';
  
    }
  
    function prev() {
  
      if (options.continuous) slide(index-1);
      else if (index) slide(index-1);
  
    }
  
    function next() {
  
      if (options.continuous) slide(index+1);
      else if (index < slides.length - 1) slide(index+1);
  
    }
  
    function circle(index) {
  
      // a simple positive modulo using slides.length
      return (slides.length + (index % slides.length)) % slides.length;
  
    }
  
    function slide(to, slideSpeed) {
  
      // do nothing if already on requested slide
      if (index == to) return;
  
      if (browser.transitions) {
  
        var direction = Math.abs(index-to) / (index-to); // 1: backward, -1: forward
  
        // get the actual position of the slide
        if (options.continuous) {
          var natural_direction = direction;
          direction = -slidePos[circle(to)] / width;
  
          // if going forward but to < index, use to = slides.length + to
          // if going backward but to > index, use to = -slides.length + to
          if (direction !== natural_direction) to =  -direction * slides.length + to;
  
        }
  
        var diff = Math.abs(index-to) - 1;
  
        // move all the slides between index and to in the right direction
        while (diff--) move( circle((to > index ? to : index) - diff - 1), width * direction, 0);
  
        to = circle(to);
  
        move(index, width * direction, slideSpeed || speed);
        move(to, 0, slideSpeed || speed);
  
        if (options.continuous) move(circle(to - direction), -(width * direction), 0); // we need to get the next in place
  
      } else {
  
        to = circle(to);
        animate(index * -width, to * -width, slideSpeed || speed);
        //no fallback for a circular continuous if the browser does not accept transitions
      }
  
      index = to;
      offloadFn(options.callback && options.callback(index, slides[index]));
    }
  
    function move(index, dist, speed) {
  
      translate(index, dist, speed);
      slidePos[index] = dist;
  
    }
  
    function translate(index, dist, speed) {
  
      var slide = slides[index];
      var style = slide && slide.style;
  
      if (!style) return;
  
      style.webkitTransitionDuration =
      style.MozTransitionDuration =
      style.msTransitionDuration =
      style.OTransitionDuration =
      style.transitionDuration = speed + 'ms';
  
      style.webkitTransform = 'translate(' + dist + 'px,0)' + 'translateZ(0)';
      style.msTransform =
      style.MozTransform =
      style.OTransform = 'translateX(' + dist + 'px)';
  
    }
  
    function animate(from, to, speed) {
  
      // if not an animation, just reposition
      if (!speed) {
  
        element.style.left = to + 'px';
        return;
  
      }
  
      var start = +new Date;
  
      var timer = setInterval(function() {
  
        var timeElap = +new Date - start;
  
        if (timeElap > speed) {
  
          element.style.left = to + 'px';
  
          if (delay) begin();
  
          options.transitionEnd && options.transitionEnd.call(event, index, slides[index]);
  
          clearInterval(timer);
          return;
  
        }
  
        element.style.left = (( (to - from) * (Math.floor((timeElap / speed) * 100) / 100) ) + from) + 'px';
  
      }, 4);
  
    }
  
    // setup auto slideshow
    var delay = options.auto || 0;
    var interval;
  
    function begin() {
  
      interval = setTimeout(next, delay);
  
    }
  
    function stop() {
  
      delay = 0;
      clearTimeout(interval);
  
    }
  
  
    // setup initial vars
    var start = {};
    var delta = {};
    var isScrolling;
  
    // setup event capturing
    var events = {
  
      handleEvent: function(event) {
  
        switch (event.type) {
          case 'touchstart': this.start(event); break;
          case 'touchmove': this.move(event); break;
          case 'touchend': offloadFn(this.end(event)); break;
          case 'webkitTransitionEnd':
          case 'msTransitionEnd':
          case 'oTransitionEnd':
          case 'otransitionend':
          case 'transitionend': offloadFn(this.transitionEnd(event)); break;
          case 'resize': offloadFn(setup); break;
        }
  
        if (options.stopPropagation) event.stopPropagation();
  
      },
      start: function(event) {
  
        var touches = event.touches[0];
  
        // measure start values
        start = {
  
          // get initial touch coords
          x: touches.pageX,
          y: touches.pageY,
  
          // store time to determine touch duration
          time: +new Date
  
        };
  
        // used for testing first move event
        isScrolling = undefined;
  
        // reset delta and end measurements
        delta = {};
  
        // attach touchmove and touchend listeners
        element.addEventListener('touchmove', this, false);
        element.addEventListener('touchend', this, false);
  
      },
      move: function(event) {
  
        // ensure swiping with one touch and not pinching
        if ( event.touches.length > 1 || event.scale && event.scale !== 1) return
  
        if (options.disableScroll) event.preventDefault();
  
        var touches = event.touches[0];
  
        // measure change in x and y
        delta = {
          x: touches.pageX - start.x,
          y: touches.pageY - start.y
        }
  
        // determine if scrolling test has run - one time test
        if ( typeof isScrolling == 'undefined') {
          isScrolling = !!( isScrolling || Math.abs(delta.x) < Math.abs(delta.y) );
        }
  
        // if user is not trying to scroll vertically
        if (!isScrolling) {
  
          // prevent native scrolling
          event.preventDefault();
  
          // stop slideshow
          stop();
  
          // increase resistance if first or last slide
          if (options.continuous) { // we don't add resistance at the end
  
            translate(circle(index-1), delta.x + slidePos[circle(index-1)], 0);
            translate(index, delta.x + slidePos[index], 0);
            translate(circle(index+1), delta.x + slidePos[circle(index+1)], 0);
  
          } else {
  
            delta.x =
              delta.x /
                ( (!index && delta.x > 0               // if first slide and sliding left
                  || index == slides.length - 1        // or if last slide and sliding right
                  && delta.x < 0                       // and if sliding at all
                ) ?
                ( Math.abs(delta.x) / width + 1 )      // determine resistance level
                : 1 );                                 // no resistance if false
  
            // translate 1:1
            translate(index-1, delta.x + slidePos[index-1], 0);
            translate(index, delta.x + slidePos[index], 0);
            translate(index+1, delta.x + slidePos[index+1], 0);
          }
  
        }
  
      },
      end: function(event) {
  
        // measure duration
        var duration = +new Date - start.time;
  
        // determine if slide attempt triggers next/prev slide
        var isValidSlide =
              Number(duration) < 250               // if slide duration is less than 250ms
              && Math.abs(delta.x) > 20            // and if slide amt is greater than 20px
              || Math.abs(delta.x) > width/2;      // or if slide amt is greater than half the width
  
        // determine if slide attempt is past start and end
        var isPastBounds =
              !index && delta.x > 0                            // if first slide and slide amt is greater than 0
              || index == slides.length - 1 && delta.x < 0;    // or if last slide and slide amt is less than 0
  
        if (options.continuous) isPastBounds = false;
  
        // determine direction of swipe (true:right, false:left)
        var direction = delta.x < 0;
  
        // if not scrolling vertically
        if (!isScrolling) {
  
          if (isValidSlide && !isPastBounds) {
  
            if (direction) {
  
              if (options.continuous) { // we need to get the next in this direction in place
  
                move(circle(index-1), -width, 0);
                move(circle(index+2), width, 0);
  
              } else {
                move(index-1, -width, 0);
              }
  
              move(index, slidePos[index]-width, speed);
              move(circle(index+1), slidePos[circle(index+1)]-width, speed);
              index = circle(index+1);
  
            } else {
              if (options.continuous) { // we need to get the next in this direction in place
  
                move(circle(index+1), width, 0);
                move(circle(index-2), -width, 0);
  
              } else {
                move(index+1, width, 0);
              }
  
              move(index, slidePos[index]+width, speed);
              move(circle(index-1), slidePos[circle(index-1)]+width, speed);
              index = circle(index-1);
  
            }
  
            options.callback && options.callback(index, slides[index]);
  
          } else {
  
            if (options.continuous) {
  
              move(circle(index-1), -width, speed);
              move(index, 0, speed);
              move(circle(index+1), width, speed);
  
            } else {
  
              move(index-1, -width, speed);
              move(index, 0, speed);
              move(index+1, width, speed);
            }
  
          }
  
        }
  
        // kill touchmove and touchend event listeners until touchstart called again
        element.removeEventListener('touchmove', events, false)
        element.removeEventListener('touchend', events, false)
  
      },
      transitionEnd: function(event) {
  
        if (parseInt(event.target.getAttribute('data-index'), 10) == index) {
  
          if (delay) begin();
  
          options.transitionEnd && options.transitionEnd.call(event, index, slides[index]);
  
        }
  
      }
  
    }
  
    // trigger setup
    setup();
  
    // start auto slideshow if applicable
    if (delay) begin();
  
  
    // add event listeners
    if (browser.addEventListener) {
  
      // set touchstart event on element
      if (browser.touch) element.addEventListener('touchstart', events, false);
  
      if (browser.transitions) {
        element.addEventListener('webkitTransitionEnd', events, false);
        element.addEventListener('msTransitionEnd', events, false);
        element.addEventListener('oTransitionEnd', events, false);
        element.addEventListener('otransitionend', events, false);
        element.addEventListener('transitionend', events, false);
      }
  
      // set resize event on window
      window.addEventListener('resize', events, false);
  
    } else {
  
      window.onresize = function () { setup() }; // to play nice with old IE
  
    }
  
    // expose the Swipe API
    return {
      setup: function() {
  
        setup();
  
      },
      slide: function(to, speed) {
  
        // cancel slideshow
        stop();
  
        slide(to, speed);
  
      },
      prev: function() {
  
        // cancel slideshow
        stop();
  
        prev();
  
      },
      next: function() {
  
        // cancel slideshow
        stop();
  
        next();
  
      },
      stop: function() {
  
        // cancel slideshow
        stop();
  
      },
      getPos: function() {
  
        // return current index position
        return index;
  
      },
      getNumSlides: function() {
  
        // return total number of slides
        return length;
      },
      kill: function() {
  
        // cancel slideshow
        stop();
  
        // reset element
        element.style.width = '';
        element.style.left = '';
  
        // reset slides
        var pos = slides.length;
        while(pos--) {
  
          var slide = slides[pos];
          slide.style.width = '';
          slide.style.left = '';
  
          if (browser.transitions) translate(pos, 0, 0);
  
        }
  
        // removed event listeners
        if (browser.addEventListener) {
  
          // remove current event listeners
          element.removeEventListener('touchstart', events, false);
          element.removeEventListener('webkitTransitionEnd', events, false);
          element.removeEventListener('msTransitionEnd', events, false);
          element.removeEventListener('oTransitionEnd', events, false);
          element.removeEventListener('otransitionend', events, false);
          element.removeEventListener('transitionend', events, false);
          window.removeEventListener('resize', events, false);
  
        }
        else {
  
          window.onresize = null;
  
        }
  
      }
    }
  
  }
  
  
  if ( window.jQuery || window.Zepto ) {
    (function($) {
      $.fn.Swipe = function(params) {
        return this.each(function() {
          $(this).data('Swipe', new Swipe($(this)[0], params));
        });
      }
    })( window.jQuery || window.Zepto )
  }